{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT6027-1BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT6027-1BF40","canonicalUrl":"https://aoctrl.com/siemens/3RT6027-1BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT6027-1BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, order code 3RT6027-1BF40, 110 V coil, S0 size, 45 mm wide, screw-type terminals, active production.","salesMarkdown":"Coil voltage is 110 V — that's the control supply it pulls from, not the main power circuit. At 400 V and 60 °C ambient the contactor handles 27.5 kW of motor load under AC-3 duty, which is the standard category for starting squirrel-cage motors and disconnecting them under full load. That 27.5 kW figure at 60 °C tells you it doesn't need derating in a warm panel; the same rating at 40 °C would be higher, but the 60 °C number is the one that governs a real industrial enclosure with drives and transformers throwing heat. The S0 frame measures 45 mm wide and 85 mm tall, with a depth of 107 mm including terminals. That 45 mm width is standard for the S0 family, so it occupies one slot in a multi-contactor lineup. Side-by-side mounting is permitted, meaning you can pack several contactors on the same DIN rail without a gap — useful when you're building a motor control center and every millimeter of rail space counts. For DC switching applications, the contactor is rated at 6 A at 24 V DC, 1 A at 110 V DC, and 0.3 A at 220 V DC. These are the maximum resistive DC currents the contacts can interrupt — DC arcs are harder to extinguish than AC, so the ratings drop sharply as voltage rises. If you're switching a DC solenoid or a brake coil, match the voltage and current to these figures, not the AC-3 motor rating. The main terminals accept 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²) — that's enough for the motor leads on a 27.5 kW load at 400 V, assuming the cable is sized for the full-load amps. Auxiliary terminals are screw-type as well, with the same wire ranges. The contactor also supports an auxiliary switch block (product extension auxiliary switch: yes), so you can add a mirror contact or a status feedback contact without replacing the whole unit. That covers most panel layouts — horizontal busbars, vertical wiring ducts, or a slanted backplate.","metaTitle":"Siemens 3RT6027-1BF40 SIRIUS Power Contactor, 110 V Coil","metaDescription":"Siemens 3RT6027-1BF40 SIRIUS power contactor, 110 V AC/DC coil, S0 frame, 45 mm wide, screw terminals. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"107 mm","Width":"45 mm","at DC":"1 500 1/h","title":"3RT6027-1BF40","Height":"85 mm","Rated Value":"110 V","description":"Contactor DC 110 V AC3 15 kW 400 V AUX contacts 1 NO +1 NC 3-pole, size S0 screw terminal","During Storage":"-55 ... +80 °C","at AC-1 maximum":"1 000 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022","at AC-3e maximum":"750 1/h","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S0","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Power contactor","at 24 V rated value":"6 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"10 A","at 400 V rated value":"3 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-3 rated value maximum":"690 V","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"10 mm²","at 60 °C minimum permissible":"10 mm²","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"15.5 kW","at 400 V at 60 °C rated value":"27.5 kW","at 690 V at 60 °C rated value":"47.5 kW","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","With Type Of Assignment 2 Required":"gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 35 A","closing power of magnet coil at DC":"5.9 W","holding power of magnet coil at DC":"5.9 W","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 100 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","at ambient temperature 40 °C rated value":"50 A","at ambient temperature 60 °C rated value":"42 A","Type Of Voltage Of The Control Supply Voltage":"DC","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/73366eea8b7a260d417ff8c9429674d5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=580217&mlfb=3RT6027-1BF40"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT6027-1BF40","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RT6027-1BF40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}